Runtoeat Posted December 6, 2018 Report Share Posted December 6, 2018 I installed a Matco nose wheel some time ago and I am putting a new tire on it. After taking the wheel apart, I'm wondering if there should be a spacer on the axle inside the wheel, between the bearings? I'm thinking a spacer should be there to keep the side loads off the bearings when the axle nut is tightened. I have tried to find information on the assembly but can't find anything. I know if I tighten the axle nut it will start to bind up the wheel bearings so I don't put a lot of torque on the nut when I tighten this. Makes me think there should be a spacer. If you have any thoughts, please let me know. Link to comment Share on other sites More sharing options...
Roger Lee Posted December 6, 2018 Report Share Posted December 6, 2018 The Matco nose wheel has no spacer. Just tighten and go. The Marc front wheel does have a spacer due to its design. Link to comment Share on other sites More sharing options...
Runtoeat Posted December 6, 2018 Author Report Share Posted December 6, 2018 Hi Roger. I see your reply to my email. Thanks! As you mentioned, the old Marc nose wheel did have a spacer. Since the Matco nose wheel also has sealed ball bearings same as the Marc wheel, I'm thinking a spacer would be good to have to prevent side loading the ball bearing when the axle is torqued. Matco has been doing this for a long time and must know what's best. Link to comment Share on other sites More sharing options...
Roger Lee Posted December 6, 2018 Report Share Posted December 6, 2018 Do not put a spacer in. It is not needed or called for by Matco. Link to comment Share on other sites More sharing options...
LS Bruce Posted December 6, 2018 Report Share Posted December 6, 2018 Ok Roger, educate us. If the outer bearing races are fixed, as is normal, and one tightens the axle against the inner races without a spacer, the bearings will be easily overloaded and fail rapidly! So what are we missing? Does anyone have a assembly sectional drawing? Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 6, 2018 Report Share Posted December 6, 2018 Try the link below, but if it doesn't work go to Matco and search for NW40CT. www.matcomfg.com/NW40CTINSTALL-idv-3922-19.html Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 6, 2018 Report Share Posted December 6, 2018 They say it should be used with spacer WHLA23SL, but doesn't say (or show) where this is used. Link to comment Share on other sites More sharing options...
Roger Lee Posted December 7, 2018 Report Share Posted December 7, 2018 The spacer is on the outside of the bearing against the fork. One on each side to center the wheel. Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 7, 2018 Report Share Posted December 7, 2018 Got it. Thanks! Link to comment Share on other sites More sharing options...
Runtoeat Posted December 7, 2018 Author Report Share Posted December 7, 2018 Yes, as Roger says - Matco provides spacers to go between wheel and fork. I've looked at the assembly drawing. No spacer shown between the bearings. There is a spacer between the bearings on the Marc wheel. With the front end supported and off the ground, I can control the amount of free spin of the wheel, depending on how much torque I give to the axle nut. With a lot of torque, I can put enough side load on the bearings to keep the wheel from turning. As LSBruce points out, this side load can cause bearing failure. The Matco wheel is a strong cast wheel and probably doesn't flex like the thin stamped Marc wheel and the bearings are large. This design is OK with light side loading. I will go with my current procedure of: "tighten the axle nut to the point where it is takes up all axial movement but short of binding the bearings". I'm guessing this is what Matco intended? Link to comment Share on other sites More sharing options...
Roger Lee Posted December 7, 2018 Report Share Posted December 7, 2018 "I will go with my current procedure of: "tighten the axle nut to the point where it is takes up all axial movement but short of binding the bearings". I'm guessing this is what Matco intended?" Yes. The axle nut should be tight, but if you're cranking it down to the point of impairment then don't use the Godzilla torque. Bring it back to human torque. LOL The Marc wheels are a stamped flimsy wheel and will bend and have a different design. Link to comment Share on other sites More sharing options...
Anticept Posted December 7, 2018 Report Share Posted December 7, 2018 Since the matco front wheels are deep groove ball bearings, I am in agreement with roger. They can take some sideload, being ball bearings, but too much will accelerate wear on the sides of the races. Link to comment Share on other sites More sharing options...
Runtoeat Posted December 7, 2018 Author Report Share Posted December 7, 2018 Thanks Roger and Corey for verifying going easy on the toque is correct. Much easier than trying to fit correct length spacer inside the wheel. Just got the new Desser tire. Looks very different than the standard 400-6. Going to install new bearings and the new tire. I hate installing the tire/tube on the Matco flat rims. Always worried about pinching the tube. I do clamp the tires to keep the beads together to hold the tube off the rim but still........it's a PITA! My order says tire was checked for roundness and balance but no marks on tire to indicate where to line up with valve stem. Also no "chevron" on my Matco wheel for line up with valve hole. I put the rim on the balancer and found the wheel heavy spot which I'll set 180 opposite where the valve is located. Painted my own chevron showing where the rims line up Link to comment Share on other sites More sharing options...
Runtoeat Posted December 8, 2018 Author Report Share Posted December 8, 2018 Installed new Desser tire on my CT today. It took less than 1/2 oz. weight to balance the wheel. Link to comment Share on other sites More sharing options...
BravoFoxtrot Posted December 9, 2018 Report Share Posted December 9, 2018 I see Desser has that tire listed: https://www.desser.com/Aircraft-Tires-and-Tubes/400-6-8-Ply-AERO-CLASSIC-PREMIUM-TT-TUBELESS-14X4-AERO-CLASS-DTR1285.asp Looks like a heavy duty tire. Will be interesting to hear your impressions after you have flown it a few hours. Link to comment Share on other sites More sharing options...
Runtoeat Posted December 10, 2018 Author Report Share Posted December 10, 2018 I've now got over 3 hours with lots of landings. The tire that Desser sent to me is very round and based on the balance of the assembly I did, it has virtually no imbalance. The two quarter ounce weights were 180 opposite the valve stem. It is a very stiff tire. A big change from the old Aero Classic. I inflated it to 35psi to make sure it was well seated in the rim. All tar strips and runway imperfections are felt. I will probably reduce the pressure to 32psi (or more) to see if this reduces some of the harsh ride. I almost believe that in the event of getting a puncture out in the bush, this could be run with no air pressure and the tire would still be OK, except it would probably turn on the rim and pull the valve stem. Ideally, this design in a 6 or even a 4 ply tire would be best for our CT's but is not offered. I forgot to weigh the tire before mounting it. I estimate it weighs at least one pound more than the standard tire. The tire I received is accurate for roundness and balance, the rubber composition looks to be tough and IMHO I think it's good looking. (Uh, oh, I'm going to get flamed like Ed did with that last comment!) Link to comment Share on other sites More sharing options...
LS Bruce Posted December 10, 2018 Report Share Posted December 10, 2018 I agree this is a very stiff tire! I had them on my CTLS mains for a few months. I finally took them off and changed back to the 6 ply. They were so stiff I felt every bump and crack transmit thru the gear legs. Nearly impossible to make a nice smooth landing. I tried them at various pressures from 35 to 22. Link to comment Share on other sites More sharing options...
Runtoeat Posted December 11, 2018 Author Report Share Posted December 11, 2018 Hi Bruce. Do you stick around chilly Lake Erie or do you go South? We need to try to get the CT's together again next summer. Link to comment Share on other sites More sharing options...
LS Bruce Posted December 12, 2018 Report Share Posted December 12, 2018 Hey Dick, it’s way too cold around the lake for me! My trusty CT migrates every October to Florida (7FL6) she returns in May. Yes, let’s do another CT fly in to Put-in-Bay island this summer. Link to comment Share on other sites More sharing options...
CT_MATT Posted December 12, 2018 Report Share Posted December 12, 2018 Put-in-bay 2019 sounds like a great plan. It’s been too long since we all caught up Link to comment Share on other sites More sharing options...
Tip Posted December 12, 2018 Report Share Posted December 12, 2018 I’ll be there! Link to comment Share on other sites More sharing options...
Olarry Posted December 13, 2018 Report Share Posted December 13, 2018 I’ll also be there. olarry Link to comment Share on other sites More sharing options...
John Vance Posted December 13, 2018 Report Share Posted December 13, 2018 If you’d like to make it an even half dozen, let me know when you’ll be going. Phil Wade would make 7. It’ll look like an invasion. Link to comment Share on other sites More sharing options...
Tip Posted December 16, 2018 Report Share Posted December 16, 2018 MEHenck will want to be included. Maybe we could make it a two day gathering and fly to all the islands. Link to comment Share on other sites More sharing options...
John Vance Posted December 16, 2018 Report Share Posted December 16, 2018 Could stay overnight at 0oh5, Freeman Swank Farms, Butler OH. It’s tent camping, with 3000 ft grass strip, toilet, shower, elec power, short walk into town to restaurants/bar. This is 1/2 hr South of Put-in-bay. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.